import { NextApiRequest, NextApiResponse } from 'next';
import { getAllPosts } from '../../../lib/content';

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  const { lang } = req.query as { lang: string };
  const hostname = process.env.SITE_URL || 'https://your-domain.com';
  const posts = getAllPosts(lang).filter(p => p.frontmatter.sitemap);

  const urls = posts.map(p => 
    `<url><loc>${hostname}/${lang}/${p.slug.join('/')}</loc><changefreq>daily</changefreq></url>`
  ).join('');

  const xml = `<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  ${urls}
</urlset>`;

  res.setHeader('Content-Type', 'application/xml');
  res.write(xml);
  res.end();
}